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/*
 *  LDForge: LDraw parts authoring CAD
 *  Copyright (C) 2013, 2014 Teemu Piippo
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <math.h>
#include <locale.h>
#include <QColor>
#include "main.h"
#include "miscallenous.h"
#include "mainWindow.h"
#include "dialogs.h"
#include "ldDocument.h"
#include "ui_rotpoint.h"

// Prime number table.
const int g_primes[NUM_PRIMES] =
{
	2,    3,    5,    7,    11,   13,   17,   19,   23,   29,
	31,   37,   41,   43,   47,   53,   59,   61,   67,   71,
	73,   79,   83,   89,   97,   101,  103,  107,  109,  113,
	127,  131,  137,  139,  149,  151,  157,  163,  167,  173,
	179,  181,  191,  193,  197,  199,  211,  223,  227,  229,
	233,  239,  241,  251,  257,  263,  269,  271,  277,  281,
	283,  293,  307,  311,  313,  317,  331,  337,  347,  349,
	353,  359,  367,  373,  379,  383,  389,  397,  401,  409,
	419,  421,  431,  433,  439,  443,  449,  457,  461,  463,
	467,  479,  487,  491,  499,  503,  509,  521,  523,  541,
	547,  557,  563,  569,  571,  577,  587,  593,  599,  601,
	607,  613,  617,  619,  631,  641,  643,  647,  653,  659,
	661,  673,  677,  683,  691,  701,  709,  719,  727,  733,
	739,  743,  751,  757,  761,  769,  773,  787,  797,  809,
	811,  821,  823,  827,  829,  839,  853,  857,  859,  863,
	877,  881,  883,  887,  907,  911,  919,  929,  937,  941,
	947,  953,  967,  971,  977,  983,  991,  997, 1009, 1013,
	1019, 1021, 1031, 1033, 1039, 1049, 1051, 1061, 1063, 1069,
	1087, 1091, 1093, 1097, 1103, 1109, 1117, 1123, 1129, 1151,
	1153, 1163, 1171, 1181, 1187, 1193, 1201, 1213, 1217, 1223,
	1229, 1231, 1237, 1249, 1259, 1277, 1279, 1283, 1289, 1291,
	1297, 1301, 1303, 1307, 1319, 1321, 1327, 1361, 1367, 1373,
	1381, 1399, 1409, 1423, 1427, 1429, 1433, 1439, 1447, 1451,
	1453, 1459, 1471, 1481, 1483, 1487, 1489, 1493, 1499, 1511,
	1523, 1531, 1543, 1549, 1553, 1559, 1567, 1571, 1579, 1583,
	1597, 1601, 1607, 1609, 1613, 1619, 1621, 1627, 1637, 1657,
	1663, 1667, 1669, 1693, 1697, 1699, 1709, 1721, 1723, 1733,
	1741, 1747, 1753, 1759, 1777, 1783, 1787, 1789, 1801, 1811,
	1823, 1831, 1847, 1861, 1867, 1871, 1873, 1877, 1879, 1889,
	1901, 1907, 1913, 1931, 1933, 1949, 1951, 1973, 1979, 1987,
	1993, 1997, 1999, 2003, 2011, 2017, 2027, 2029, 2039, 2053,
	2063, 2069, 2081, 2083, 2087, 2089, 2099, 2111, 2113, 2129,
	2131, 2137, 2141, 2143, 2153, 2161, 2179, 2203, 2207, 2213,
	2221, 2237, 2239, 2243, 2251, 2267, 2269, 2273, 2281, 2287,
	2293, 2297, 2309, 2311, 2333, 2339, 2341, 2347, 2351, 2357,
	2371, 2377, 2381, 2383, 2389, 2393, 2399, 2411, 2417, 2423,
	2437, 2441, 2447, 2459, 2467, 2473, 2477, 2503, 2521, 2531,
	2539, 2543, 2549, 2551, 2557, 2579, 2591, 2593, 2609, 2617,
	2621, 2633, 2647, 2657, 2659, 2663, 2671, 2677, 2683, 2687,
	2689, 2693, 2699, 2707, 2711, 2713, 2719, 2729, 2731, 2741,
	2749, 2753, 2767, 2777, 2789, 2791, 2797, 2801, 2803, 2819,
	2833, 2837, 2843, 2851, 2857, 2861, 2879, 2887, 2897, 2903,
	2909, 2917, 2927, 2939, 2953, 2957, 2963, 2969, 2971, 2999,
	3001, 3011, 3019, 3023, 3037, 3041, 3049, 3061, 3067, 3079,
	3083, 3089, 3109, 3119, 3121, 3137, 3163, 3167, 3169, 3181,
	3187, 3191, 3203, 3209, 3217, 3221, 3229, 3251, 3253, 3257,
	3259, 3271, 3299, 3301, 3307, 3313, 3319, 3323, 3329, 3331,
	3343, 3347, 3359, 3361, 3371, 3373, 3389, 3391, 3407, 3413,
	3433, 3449, 3457, 3461, 3463, 3467, 3469, 3491, 3499, 3511,
	3517, 3527, 3529, 3533, 3539, 3541, 3547, 3557, 3559, 3571,
};

static const long g_e10[] =
{
	1l,
	10l,
	100l,
	1000l,
	10000l,
	100000l,
	1000000l,
	10000000l,
	100000000l,
	1000000000l,
};

// =============================================================================
//
// Grid stuff
//
CFGENTRY (Int, Grid, Grid::Medium)
CFGENTRY (Float, GridCoarseCoordinateSnap, 5.0f)
CFGENTRY (Float, GridCoarseAngleSnap, 45.0f)
CFGENTRY (Float, GridMediumCoordinateSnap, 1.0f)
CFGENTRY (Float, GridMediumAngleSnap, 22.5f)
CFGENTRY (Float, GridFineCoordinateSnap, 0.1f)
CFGENTRY (Float, GridFineAngleSnap, 7.5f)
CFGENTRY (Int, RotationPointType, 0)
CFGENTRY (Vertex, CustomRotationPoint, g_origin)

const gridinfo g_gridInfo[3] =
{
	{ "Coarse",	&cfg::GridCoarseCoordinateSnap,	&cfg::GridCoarseAngleSnap	},
	{ "Medium",	&cfg::GridMediumCoordinateSnap,	&cfg::GridMediumAngleSnap	},
	{ "Fine",	&cfg::GridFineCoordinateSnap,	&cfg::GridFineAngleSnap	},
};

// =============================================================================
//
// Snap the given coordinate value on the current grid's given axis.
//
double Grid::snap (double value, const Grid::Config type)
{
	double snapvalue = (type == Coordinate) ? *currentGrid().coordsnap : *currentGrid().anglesnap;
	double mult = floor (abs<double> (value / snapvalue));
	double out = mult * snapvalue;

	if (abs (value) - (mult * snapvalue) > snapvalue / 2)
		out += snapvalue;

	if (value < 0)
		out = -out;

	return out;
}

// =============================================================================
//
void simplify (int& numer, int& denom)
{
	bool repeat;

	do
	{
		repeat = false;

		for (int x = 0; x < countof (g_primes); x++)
		{
			int const prime = g_primes[x];

			if (numer < prime and denom < prime)
				break;

			if ((numer % prime == 0) and (denom % prime == 0))
			{
				numer /= prime;
				denom /= prime;
				repeat = true;
				break;
			}
		}
	} while (repeat);
}

// =============================================================================
//
Vertex rotPoint (const LDObjectList& objs)
{
	switch ((ERotationPoint) cfg::RotationPointType)
	{
		case EObjectOrigin:
		{
			LDBoundingBox box;

			// Calculate center vertex
			for (LDObjectPtr obj : objs)
			{
				if (obj->hasMatrix())
					box << obj.dynamicCast<LDMatrixObject>()->position();
				else
					box << obj;
			}

			return box.center();
		}

		case EWorldOrigin:
		{
			return g_origin;
		}

		case ECustomPoint:
		{
			return cfg::CustomRotationPoint;
		}
	}

	return Vertex();
}

// =============================================================================
//
void configRotationPoint()
{
	QDialog* dlg = new QDialog;
	Ui::RotPointUI ui;
	ui.setupUi (dlg);

	switch ((ERotationPoint) cfg::RotationPointType)
	{
		case EObjectOrigin:
			ui.objectPoint->setChecked (true);
			break;

		case EWorldOrigin:
			ui.worldPoint->setChecked (true);
			break;

		case ECustomPoint:
			ui.customPoint->setChecked (true);
			break;
	}

	ui.customX->setValue (cfg::CustomRotationPoint.x());
	ui.customY->setValue (cfg::CustomRotationPoint.y());
	ui.customZ->setValue (cfg::CustomRotationPoint.z());

	if (not dlg->exec())
		return;

	cfg::RotationPointType =
		(ui.objectPoint->isChecked()) ? EObjectOrigin :
		(ui.worldPoint->isChecked())  ? EWorldOrigin :
		ECustomPoint;

	cfg::CustomRotationPoint.setX (ui.customX->value());
	cfg::CustomRotationPoint.setY (ui.customY->value());
	cfg::CustomRotationPoint.setZ (ui.customZ->value());
}

// =============================================================================
//
QString join (QList<StringFormatArg> vals, QString delim)
{
	QStringList list;

	for (const StringFormatArg& arg : vals)
		list << arg.text();

	return list.join (delim);
}

// =============================================================================
//
void roundToDecimals (double& a, int decimals)
{
	assert (decimals >= 0 and decimals < (signed) (sizeof g_e10 / sizeof *g_e10));
	a = round (a * g_e10[decimals]) / g_e10[decimals];
}

// =============================================================================
//
void applyToMatrix (Matrix& a, ApplyToMatrixFunction func)
{
	for (int i = 0; i < 9; ++i)
		func (i, a[i]);
}

// =============================================================================
//
void applyToMatrix (const Matrix& a, ApplyToMatrixConstFunction func)
{
	for (int i = 0; i < 9; ++i)
		func (i, a[i]);
}

// =============================================================================
//
double getCoordinate (const Vertex& a, Axis ax)
{
	switch (ax)
	{
		case X: return a.x();
		case Y: return a.y();
		case Z: return a.z();
	}

	assert (false);
	return 0.0;
}


// =============================================================================
//
QString prettyFileSize (qint64 size)
{
	QString result;

	if (size < 1024)
		return QString::number (size) + " bytes";
	else if (size < (1024 * 1024))
		return QString::number ((double) size / 1024, 'f', 1) + " Kb";
	else if (size < (1024 * 1024 * 1024))
		return QString::number ((double) size / (1024 * 1024), 'f', 1) + " Mb";
	else
		return QString::number ((double) size / (1024 * 1024 * 1024), 'f', 1) + " Gb";
}